Home / 20,345.87-28,087.03-13,551.19

Finding the Fourth Proportional to 20,345.87, 28,087.03 and 13,551.19

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Solution

The fourth proportional to 20,345.87, 28,087.03 and 13,551.19 is: 18,707.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,345.87 : 28,087.03 = 13,551.19 : x
  2. Step 2: Convert to fraction form
    20,345.87/28,087.03 = 13,551.19/x
  3. Step 3: Cross multiply
    20,345.87x = 28,087.03 × 13,551.19
  4. Step 4: Simplify right side
    20,345.87x = 380,612,575.97
  5. Step 5: Solve for x
    x = 380,612,575.97/20,345.87
  6. Step 6: Final answer
    x = 18,707.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.